The cause of U disk failure and its solution

The general U disk fault is divided into soft faults and hard faults, of which the most common soft faults.

Soft fault is mainly refers to a U disk has bad block, which can lead to a U disk to be recognized by the computer, but no letter appears, or a letter appears, but when you open the U disk is prompted to format, and format can not be successful. Early signs may be: U disk read and write slow, file loss but still occupy space. This kind of bad disk can generally be repaired by the software low grid, the current commonly used low grid repair tools have Mformat (you can go online search download, use extremely convenient, less than a minute to repair), of course, some U disk manufacturers will also provide some similar software. The author thinks that since it is low lattice, the type of fault is the same, it should be the low grid tool Lformat can also be used, but because the Lformat is running in DOS, relatively troublesome, and the author has not specifically tried, so do not recommend use.

Hard fault mainly refers to U disk hardware failure, insert a U disk after the computer will find new hardware, but can not appear, open U disk without any circuit board burned or other damage traces, and the application of soft fault methods can not be resolved. (I had a U disk a long time ago, because the letter can not appear, go to the after-sales service department overhaul, because the author is also in the scene, see them inserted for a long time, even soft repair did not try, said is unable to repair, directly to change a piece, fortunately, also showed the ignorance of these people. Hard fault is generally a U disk in the vulnerable element crystal vibration due to severe vibration damage, readers can try to spend less than a dollar to the electronic market to buy a same-frequency crystal vibration replacement of the original crystal.

Down to illustrate the bad U disk in the file recovery problem, u disk File recovery only exists in the soft fault of the U disk can be recognized, but the hint requires formatting is not a successful situation. Readers can go online to download some similar to easyrecover, such as file recovery software, the author has used this software to solve several times U disk and hard disk file recovery.

U disk (USB) data recovery mainly includes: abnormal plug caused by (hint to format, file loss) a variety of problems, mistakenly deleted, wrong format, virus damage, physical bad, etc., u disk (USB) recovery rate to see U disk (USB) is recognized, if the U disk can not identify, data recovery is difficult, other circumstances U disk ( USB disk) Data recovery success rate is very high.

U disk (USB) Common fault type:

Insert U disk (USB) There is a letter, but it is not open, double-click the letter prompts "Please insert the disk into the drive"

Incorrectly formatted

Mistakenly deleted

Hint unformatted

Do not recognize a plate

CRC error

Once the data crisis, to maintain a leisurely state of mind is very important, otherwise rush will likely cause greater damage, and thus irreparable. In Search of u disk (USB) Data recovery service Provider's help, we recommend that you first try some of the conventional remedies. But all this has to be done on a reasonable basis, or it could cause two damage to the data.

U disk (USB) data recovery software:

Commonly used for general data recovery software can be a simple USB disk (USB) data recovery work, such as: Easyrecovery,fianldata,recovery4all and so on.

How to restore U disk (USB) data:

specific to the U disk (USB) Data recovery method Here is not detailed elaboration, you can search engines to find the above mentioned conventional data recovery software, according to its specific use methods for data recovery work.

U disk (USB) repair of the common software download:

U disk (USB) repair of the commonly used software mainly: Mformat,uformat,usboot, and so on, the specific software download address please everyone on the network to find a good, I wish you good luck.

U disk (USB) data Repair Repair experience:

Below on the friends are very concerned about also difficult to learn a technology to everyone to do a simple introduction, a lot of friends ask us to understand the U disk (USB) data recovery methods, The following summary of the method to be introduced to meet the lack of professional data recovery equipment maintenance personnel Reference: Many people have encountered the request for data recovery customers, but they do not have a clear method, the following case on the U disk (USB) data recovery of the specific methods to explain:

Case one: There is a customer request for the U disk data recovery capacity of 256m, the customer to get the U disk access to the computer without any reflection! Because the internal engineering of the CAD drawing is very important

1, open u disk (USB) is packaged as a whole, customer requirements as long as the data, so the shell does not need to be considered, after the disassembly of the main control of the use of I5062 program specific as follows:

(1) Power supply: Check VCC main power supply voltage is normal (vcc=3v power supply is the key voltage for u disk work)

(2) Clock: By measuring the clock crystal two feet have about 0.8v voltage, the preliminary judgment clock circuit normal, using substitution method to replace the crystal oscillator failure is still (clock signal is the inevitable condition of the main control work) _vgtm&v

(3) Communication: Through the above two points of measurement, preliminary judgement of power supply and clock are normal, mainly check the communication line is normal, check and D to the main control line is also normal!

(4) Through the above measurement, you can initially determine the main control of the working conditions are all available, the rest is the main control problem. I believe everyone will replace the main control and achieve the purpose of data recovery, but we have many years of experience to tell you, wrong, because the U Disk Master Control chip internal control program, when the replacement of a new master is not the flash to identify the control, you must pass the first production tool to make it, But this will be the flash to the lower grid damage to the internal storage of data! According to our years of experience, the main control damage is due to internal DC converter leakage, so that the main control of the internal power supply low caused by the failure to work, the solution is as follows:

Remove the 3v regulator tube of u disk (USB), in its 3v output end of an external adjustable power supply adjusted to 3v voltage, each 0.1v way to adjust the voltage, when the U disk can be normally recognized when the voltage is stopped, so you can read the data out of the U disk. The principle is because the main control of the internal-DC converter leakage, so that the normal vcc=3v voltage can not meet the main control work, at this time can be artificially adjust its supply voltage to compensate for leakage losses! When I put the voltage to 3.4v when the computer can be normal identification, the U disk quickly copy the data to save, 800 yuan hand, simple bar, oh, technology is the first productivity point yes!

Case two: a customer to bring U disk (USB), there is a factory's annual report, because more than the maintenance department has not dared to take this live, so the customer directly asking for 1000 yuan, the data for the overall recovery, U disk phenomenon can be recognized, but open prompt "please format U disk (USB)"! For the second question I believe that we all feel very difficult, because you can completely judge the hardware of the U disk is not a problem, most of them are software problems, but you can not format the disk, how to do? The specific solution:

Our engineers first tear down the U-disk flash to protect the data, reload a same model of flash, access to the computer is still prompted to format, because there is no data in the new flash, format can be normal access to data, but the data on the flash will be prompted to format, So our method is, do not install Flash U disk access to the computer, the system prompts format, the U disk itself after the format in the attribute to see the capacity of 16kb, loaded with data flash, access to the computer, the system is not prompted to format, the smooth reading of the internal data! Repair completed above two points is the engineer years of experience, Hope for everyone to help, for you want to learn to repair U disk members, can be referred to the previous period of time to write the "end-level U disk repair ideas and methods" to solve, the success rate can reach 100%! Practice shows that the main control of U disk and flash damage is very low!